$data = $memcache->get();
if (!data) {
// Build $data
}

// Code Here

That way you don’t have to fetch twice.

Also, in cases when your site doesn’t get a lot of writes, you can cache the whole page, and set hooks in the administration panel to clear the cache on UPDATES/DELETES:

$data = $memcache->get($_SERVER['REQUEST_URI']);
if ($data) {
// Cache Hit
echo $data;
die();
}

// Cache Miss
ob_start();
ob_implicit_flush(false);

// Your code goes here

$data = ob_get_contents();
$memcache->set($_SERVER['REQUEST_URI'], $data);
ob_end_flush();

function mcQuery($sql_query, $key){
global $mc;
$result = $mc->get($key);
if(!$result){
$rs = mysql_query($sql_query);
if(mysql_num_rows($row)){
while($row = mysql_fetch_array($rs))
$result[] = $row;

$memcache->set($key,$result, 0, 3600);
}
}

return $result;
}

$mc = new Memcache;
$mc->connect(‘memcache_host’, 11211);

$rs = mcQuery(‘SELECT * FROM posts ORDER BY date LIMIT 5′, ‘recent_posts’);
for($i=0;$i<count($rs);$i++){
echo “”.$rs[$i]['title'].”";
}